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<FONT color="green">001</FONT>    package algorithms;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.awt.event.ActionEvent;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.awt.event.ActionListener;<a name="line.4"></a>
<FONT color="green">005</FONT>    import register.Register;<a name="line.5"></a>
<FONT color="green">006</FONT>    import gates.Factory;<a name="line.6"></a>
<FONT color="green">007</FONT>    import gui.UserInterface;<a name="line.7"></a>
<FONT color="green">008</FONT>    <a name="line.8"></a>
<FONT color="green">009</FONT>    /**<a name="line.9"></a>
<FONT color="green">010</FONT>     * Class defining Grovers Circuit, the GUI to display the circuit results and all gates contained within the circuit.<a name="line.10"></a>
<FONT color="green">011</FONT>     * Main role is handling the UI.<a name="line.11"></a>
<FONT color="green">012</FONT>     * @author Matt Cole, Alex Bush <a name="line.12"></a>
<FONT color="green">013</FONT>     */<a name="line.13"></a>
<FONT color="green">014</FONT>    public class GroverCircuit implements ActionListener {<a name="line.14"></a>
<FONT color="green">015</FONT>            /**Minimum number of allowed qubits*/<a name="line.15"></a>
<FONT color="green">016</FONT>            private final int minNumQubits = 1;<a name="line.16"></a>
<FONT color="green">017</FONT>            /**Maximum number of allowed qubits, as limited by classical architecture*/<a name="line.17"></a>
<FONT color="green">018</FONT>            private final int maxNumQubits = 16;<a name="line.18"></a>
<FONT color="green">019</FONT>            /**Store the UI object to give the gui*/<a name="line.19"></a>
<FONT color="green">020</FONT>            private UserInterface UI;<a name="line.20"></a>
<FONT color="green">021</FONT>            /**number of qubits in register*/<a name="line.21"></a>
<FONT color="green">022</FONT>            protected int numQubits;<a name="line.22"></a>
<FONT color="green">023</FONT>            /**Quantum register*/<a name="line.23"></a>
<FONT color="green">024</FONT>            protected Register reg;<a name="line.24"></a>
<FONT color="green">025</FONT>            /**number of iterations*/<a name="line.25"></a>
<FONT color="green">026</FONT>            protected int iteration;        <a name="line.26"></a>
<FONT color="green">027</FONT>            /**element being searched for*/<a name="line.27"></a>
<FONT color="green">028</FONT>            protected int searchElem;<a name="line.28"></a>
<FONT color="green">029</FONT>            /**boolean to determine whether or not the vector plot needs updating*/<a name="line.29"></a>
<FONT color="green">030</FONT>            protected boolean updateVectorPlot;<a name="line.30"></a>
<FONT color="green">031</FONT>            /**optimal number of grover iterations. This is based on equations found in Quantum <a name="line.31"></a>
<FONT color="green">032</FONT>             * Computing and Quantum Information */<a name="line.32"></a>
<FONT color="green">033</FONT>            private int optimal;<a name="line.33"></a>
<FONT color="green">034</FONT>            /**number of states in the register*/<a name="line.34"></a>
<FONT color="green">035</FONT>            private double numStates;<a name="line.35"></a>
<FONT color="green">036</FONT>            /**message giving the optimal number of iterations*/<a name="line.36"></a>
<FONT color="green">037</FONT>            private String optimalString;<a name="line.37"></a>
<FONT color="green">038</FONT>            <a name="line.38"></a>
<FONT color="green">039</FONT>            // Stores the number of the qubit to be prepared. If this is less than the number of qubits in the<a name="line.39"></a>
<FONT color="green">040</FONT>            // register then the nextStep() method will prepare the resister accordingly rather than applying the next<a name="line.40"></a>
<FONT color="green">041</FONT>            // iteration of the algorithm.<a name="line.41"></a>
<FONT color="green">042</FONT>            protected int qubitPrepare;                                     <a name="line.42"></a>
<FONT color="green">043</FONT>            <a name="line.43"></a>
<FONT color="green">044</FONT>            public GroverCircuit() {<a name="line.44"></a>
<FONT color="green">045</FONT>                    iteration = 0;<a name="line.45"></a>
<FONT color="green">046</FONT>                    numQubits = 0;<a name="line.46"></a>
<FONT color="green">047</FONT>                    qubitPrepare = 0;       <a name="line.47"></a>
<FONT color="green">048</FONT>                    updateVectorPlot = false;<a name="line.48"></a>
<FONT color="green">049</FONT>            }<a name="line.49"></a>
<FONT color="green">050</FONT>            <a name="line.50"></a>
<FONT color="green">051</FONT>            /**<a name="line.51"></a>
<FONT color="green">052</FONT>             * Initiate the program.<a name="line.52"></a>
<FONT color="green">053</FONT>             */<a name="line.53"></a>
<FONT color="green">054</FONT>            public void runAlgorithm() {<a name="line.54"></a>
<FONT color="green">055</FONT>                    // Create the UI. Pass "this" so that Circuit can be added as an action<a name="line.55"></a>
<FONT color="green">056</FONT>                    // listener to the buttons on the interface<a name="line.56"></a>
<FONT color="green">057</FONT>                    UI = new UserInterface(this);<a name="line.57"></a>
<FONT color="green">058</FONT>                    UI.showIntro();<a name="line.58"></a>
<FONT color="green">059</FONT>            }<a name="line.59"></a>
<FONT color="green">060</FONT>            <a name="line.60"></a>
<FONT color="green">061</FONT>            /**<a name="line.61"></a>
<FONT color="green">062</FONT>             * Controls what the program does when a button is clicked.<a name="line.62"></a>
<FONT color="green">063</FONT>             */<a name="line.63"></a>
<FONT color="green">064</FONT>            public void actionPerformed(ActionEvent event) {<a name="line.64"></a>
<FONT color="green">065</FONT>                    <a name="line.65"></a>
<FONT color="green">066</FONT>                    // Next button on intro window. The following code simply retrieves the user<a name="line.66"></a>
<FONT color="green">067</FONT>                    // input and checks its validity<a name="line.67"></a>
<FONT color="green">068</FONT>                    if(event.getActionCommand().equals("next")) {<a name="line.68"></a>
<FONT color="green">069</FONT>                            numQubits = 0;<a name="line.69"></a>
<FONT color="green">070</FONT>                            boolean validRegSize = false; <a name="line.70"></a>
<FONT color="green">071</FONT>                            boolean validSearchElem = false;<a name="line.71"></a>
<FONT color="green">072</FONT>                            boolean correctDataType = false;<a name="line.72"></a>
<FONT color="green">073</FONT>                            <a name="line.73"></a>
<FONT color="green">074</FONT>                            // Check that the inputs are integers<a name="line.74"></a>
<FONT color="green">075</FONT>                            try {<a name="line.75"></a>
<FONT color="green">076</FONT>                                    numQubits = Integer.parseInt(UI.getNumQubits());<a name="line.76"></a>
<FONT color="green">077</FONT>                                    searchElem = Integer.parseInt(UI.getSearchElem());<a name="line.77"></a>
<FONT color="green">078</FONT>                                    correctDataType = true;<a name="line.78"></a>
<FONT color="green">079</FONT>                            }<a name="line.79"></a>
<FONT color="green">080</FONT>                            catch(NumberFormatException e) {<a name="line.80"></a>
<FONT color="green">081</FONT>                                    UI.inputError("Enter integers only.");<a name="line.81"></a>
<FONT color="green">082</FONT>                                    UI.showIntro();<a name="line.82"></a>
<FONT color="green">083</FONT>                            }<a name="line.83"></a>
<FONT color="green">084</FONT>                            <a name="line.84"></a>
<FONT color="green">085</FONT>                            // Check that the numQubits is acceptable<a name="line.85"></a>
<FONT color="green">086</FONT>                            if(correctDataType) {<a name="line.86"></a>
<FONT color="green">087</FONT>                                    if(numQubits &gt;= minNumQubits &amp;&amp; numQubits &lt;= maxNumQubits) {<a name="line.87"></a>
<FONT color="green">088</FONT>                                            validRegSize = true;<a name="line.88"></a>
<FONT color="green">089</FONT>                                    }<a name="line.89"></a>
<FONT color="green">090</FONT>                                    else {<a name="line.90"></a>
<FONT color="green">091</FONT>                                            validRegSize = false;<a name="line.91"></a>
<FONT color="green">092</FONT>                                            UI.inputError("Enter a register size between "<a name="line.92"></a>
<FONT color="green">093</FONT>                                                            + minNumQubits + " and " + maxNumQubits + ".");<a name="line.93"></a>
<FONT color="green">094</FONT>                                            UI.showIntro();<a name="line.94"></a>
<FONT color="green">095</FONT>                                    }<a name="line.95"></a>
<FONT color="green">096</FONT>                                    <a name="line.96"></a>
<FONT color="green">097</FONT>                                    // Check that the searchElem size is acceptable         <a name="line.97"></a>
<FONT color="green">098</FONT>                                    if(validRegSize) {<a name="line.98"></a>
<FONT color="green">099</FONT>                                            int maxSearchElem = (int)Math.pow(2,numQubits)-1;<a name="line.99"></a>
<FONT color="green">100</FONT>                                            if(searchElem &gt;= 0 &amp;&amp; searchElem &lt;= maxSearchElem) {<a name="line.100"></a>
<FONT color="green">101</FONT>                                                    validSearchElem = true;<a name="line.101"></a>
<FONT color="green">102</FONT>                                            }<a name="line.102"></a>
<FONT color="green">103</FONT>                                            else {<a name="line.103"></a>
<FONT color="green">104</FONT>                                                    validSearchElem = false;<a name="line.104"></a>
<FONT color="green">105</FONT>                                                    UI.inputError("Enter a search element between 1 and "<a name="line.105"></a>
<FONT color="green">106</FONT>                                                                    + maxSearchElem + ".");<a name="line.106"></a>
<FONT color="green">107</FONT>                                                    UI.showIntro();<a name="line.107"></a>
<FONT color="green">108</FONT>                                            }<a name="line.108"></a>
<FONT color="green">109</FONT>                                            <a name="line.109"></a>
<FONT color="green">110</FONT>                                            // If all tests are passed, proceed to the next step by displaying the main window<a name="line.110"></a>
<FONT color="green">111</FONT>                                            if(validRegSize &amp;&amp; validSearchElem) {<a name="line.111"></a>
<FONT color="green">112</FONT>                                                    reg = new Register(numQubits);<a name="line.112"></a>
<FONT color="green">113</FONT>                                                    numStates = Math.pow(2,numQubits);<a name="line.113"></a>
<FONT color="green">114</FONT>                                                    double optimalDoub = Math.acos(Math.sqrt(1.0/numStates))/  (Math.asin(2*Math.sqrt(numStates-1)/numStates));<a name="line.114"></a>
<FONT color="green">115</FONT>                                                    if((optimalDoub*2)%2==1){<a name="line.115"></a>
<FONT color="green">116</FONT>                                                            optimal=(int)Math.floor(optimalDoub);<a name="line.116"></a>
<FONT color="green">117</FONT>                                                    }<a name="line.117"></a>
<FONT color="green">118</FONT>                                                    else{<a name="line.118"></a>
<FONT color="green">119</FONT>                                                            optimal = Math.round((float)optimalDoub);<a name="line.119"></a>
<FONT color="green">120</FONT>                                                    }<a name="line.120"></a>
<FONT color="green">121</FONT>                                                    optimalString = "The optimal number of Grover iterations is " + optimal + ".\n";<a name="line.121"></a>
<FONT color="green">122</FONT>                                                    UI.showMain(reg, searchElem);<a name="line.122"></a>
<FONT color="green">123</FONT>                                                    UI.enableMeasureButton();<a name="line.123"></a>
<FONT color="green">124</FONT>                                                    UI.printMessage(getName() + " with a " + numQubits + " qubit register." + "\n"+<a name="line.124"></a>
<FONT color="green">125</FONT>                                                                    " The search element is " + searchElem + ".\n" +<a name="line.125"></a>
<FONT color="green">126</FONT>                                                                    optimalString);<a name="line.126"></a>
<FONT color="green">127</FONT>                                            }<a name="line.127"></a>
<FONT color="green">128</FONT>                                            <a name="line.128"></a>
<FONT color="green">129</FONT>                                    }<a name="line.129"></a>
<FONT color="green">130</FONT>                            }<a name="line.130"></a>
<FONT color="green">131</FONT>                    }<a name="line.131"></a>
<FONT color="green">132</FONT>                    <a name="line.132"></a>
<FONT color="green">133</FONT>                    // Exit button closes the program<a name="line.133"></a>
<FONT color="green">134</FONT>                    else if(event.getActionCommand().equals("exit")) {<a name="line.134"></a>
<FONT color="green">135</FONT>                            System.exit(0);<a name="line.135"></a>
<FONT color="green">136</FONT>                    }<a name="line.136"></a>
<FONT color="green">137</FONT>                    <a name="line.137"></a>
<FONT color="green">138</FONT>                    // Next step button on main window calls the next step method<a name="line.138"></a>
<FONT color="green">139</FONT>                    // and updates the screen<a name="line.139"></a>
<FONT color="green">140</FONT>                    else if(event.getActionCommand().equals("next_step")) {<a name="line.140"></a>
<FONT color="green">141</FONT>                            // Performs the next step of the algorithm, storing the action taken as a string<a name="line.141"></a>
<FONT color="green">142</FONT>                            String action = nextStep();<a name="line.142"></a>
<FONT color="green">143</FONT>                            // Pass the newly altered register along with the action taken to the UI<a name="line.143"></a>
<FONT color="green">144</FONT>                            UI.update(reg, action, updateVectorPlot);<a name="line.144"></a>
<FONT color="green">145</FONT>                    }<a name="line.145"></a>
<FONT color="green">146</FONT>                    <a name="line.146"></a>
<FONT color="green">147</FONT>                    // Measure button on the main window<a name="line.147"></a>
<FONT color="green">148</FONT>                    else if(event.getActionCommand().equals("measure")) {<a name="line.148"></a>
<FONT color="green">149</FONT>                            String result = measureRegister();<a name="line.149"></a>
<FONT color="green">150</FONT>                            UI.update(reg, result, false);<a name="line.150"></a>
<FONT color="green">151</FONT>                            UI.disableStepButtons();<a name="line.151"></a>
<FONT color="green">152</FONT>                    }<a name="line.152"></a>
<FONT color="green">153</FONT>                    <a name="line.153"></a>
<FONT color="green">154</FONT>                    // Reset button on the main window<a name="line.154"></a>
<FONT color="green">155</FONT>                    else if(event.getActionCommand().equals("reset")) {<a name="line.155"></a>
<FONT color="green">156</FONT>                            iteration = 0;<a name="line.156"></a>
<FONT color="green">157</FONT>                            qubitPrepare = 0;<a name="line.157"></a>
<FONT color="green">158</FONT>                            reg.setToGroundState();<a name="line.158"></a>
<FONT color="green">159</FONT>                            UI.showMain(reg, searchElem);<a name="line.159"></a>
<FONT color="green">160</FONT>                            UI.printMessage("Reset " + getName() + " with a " + numQubits + " qubit register." +<a name="line.160"></a>
<FONT color="green">161</FONT>                                            " The search element is " + searchElem + ".\n" + optimalString);<a name="line.161"></a>
<FONT color="green">162</FONT>                            UI.enableMeasureButton();<a name="line.162"></a>
<FONT color="green">163</FONT>                    }<a name="line.163"></a>
<FONT color="green">164</FONT>                    <a name="line.164"></a>
<FONT color="green">165</FONT>                    // New simulatoin button on the main window<a name="line.165"></a>
<FONT color="green">166</FONT>                    else if(event.getActionCommand().equals("new")) {<a name="line.166"></a>
<FONT color="green">167</FONT>                            iteration = 0;<a name="line.167"></a>
<FONT color="green">168</FONT>                            qubitPrepare = 0;<a name="line.168"></a>
<FONT color="green">169</FONT>                            UI.showIntro();<a name="line.169"></a>
<FONT color="green">170</FONT>                    }<a name="line.170"></a>
<FONT color="green">171</FONT>                    <a name="line.171"></a>
<FONT color="green">172</FONT>            }<a name="line.172"></a>
<FONT color="green">173</FONT>            <a name="line.173"></a>
<FONT color="green">174</FONT>            /**<a name="line.174"></a>
<FONT color="green">175</FONT>             * Provide the next step of the iteration.<a name="line.175"></a>
<FONT color="green">176</FONT>             * Initially applies &lt;code&gt;numQubits&lt;/code&gt; number of Hadamard gates, one for each qubit,<a name="line.176"></a>
<FONT color="green">177</FONT>             * to prepare the register. This will not increment the counter.<a name="line.177"></a>
<FONT color="green">178</FONT>             * Then performs as many iteration steps as the user wants.<a name="line.178"></a>
<FONT color="green">179</FONT>             * @return String to print to the UI.<a name="line.179"></a>
<FONT color="green">180</FONT>             */<a name="line.180"></a>
<FONT color="green">181</FONT>            public String nextStep() {<a name="line.181"></a>
<FONT color="green">182</FONT>                    if (qubitPrepare &lt; numQubits){<a name="line.182"></a>
<FONT color="green">183</FONT>                            <a name="line.183"></a>
<FONT color="green">184</FONT>                            // The vector panel does not need to be updated until the last preparation<a name="line.184"></a>
<FONT color="green">185</FONT>                            updateVectorPlot = false;<a name="line.185"></a>
<FONT color="green">186</FONT>                            <a name="line.186"></a>
<FONT color="green">187</FONT>                            // If this is the last preparation then the vector panel will need to be updated<a name="line.187"></a>
<FONT color="green">188</FONT>                            if (qubitPrepare == numQubits-1){<a name="line.188"></a>
<FONT color="green">189</FONT>                                    updateVectorPlot = true;<a name="line.189"></a>
<FONT color="green">190</FONT>                            }<a name="line.190"></a>
<FONT color="green">191</FONT>                            <a name="line.191"></a>
<FONT color="green">192</FONT>                            // Prepare the register for the current prepare qubit<a name="line.192"></a>
<FONT color="green">193</FONT>                            String action = prepareRegister();<a name="line.193"></a>
<FONT color="green">194</FONT>                            qubitPrepare++;<a name="line.194"></a>
<FONT color="green">195</FONT>                            return action;<a name="line.195"></a>
<FONT color="green">196</FONT>                    }<a name="line.196"></a>
<FONT color="green">197</FONT>                    else {<a name="line.197"></a>
<FONT color="green">198</FONT>                            <a name="line.198"></a>
<FONT color="green">199</FONT>                            // The vector plot will be updated next time the UI is updated.<a name="line.199"></a>
<FONT color="green">200</FONT>                            updateVectorPlot = true;<a name="line.200"></a>
<FONT color="green">201</FONT>                            return performIteration();<a name="line.201"></a>
<FONT color="green">202</FONT>                            <a name="line.202"></a>
<FONT color="green">203</FONT>                    }<a name="line.203"></a>
<FONT color="green">204</FONT>            }<a name="line.204"></a>
<FONT color="green">205</FONT>            <a name="line.205"></a>
<FONT color="green">206</FONT>            /**<a name="line.206"></a>
<FONT color="green">207</FONT>             * Measures the register returning information about the measurement. <a name="line.207"></a>
<FONT color="green">208</FONT>             * Will only make measurement if the register has been prepared.<a name="line.208"></a>
<FONT color="green">209</FONT>             * @return Result, number of iterations taken and expected result. To be printed to the UI.<a name="line.209"></a>
<FONT color="green">210</FONT>             */<a name="line.210"></a>
<FONT color="green">211</FONT>            public String measureRegister() {<a name="line.211"></a>
<FONT color="green">212</FONT>            <a name="line.212"></a>
<FONT color="green">213</FONT>                    // Reset the vector diagram as no long valid<a name="line.213"></a>
<FONT color="green">214</FONT>                    UI.removeRegStateVector();<a name="line.214"></a>
<FONT color="green">215</FONT>                    <a name="line.215"></a>
<FONT color="green">216</FONT>                    // Apply the measurement to the register<a name="line.216"></a>
<FONT color="green">217</FONT>                    Factory.createMeasurement().apply(reg);<a name="line.217"></a>
<FONT color="green">218</FONT>                    int result = reg.postMeasure();<a name="line.218"></a>
<FONT color="green">219</FONT>                    String output = getName() + " returns a result of " + result + " after " + iteration +<a name="line.219"></a>
<FONT color="green">220</FONT>                    " iteration(s). The expected result is " + searchElem + ".";<a name="line.220"></a>
<FONT color="green">221</FONT>                    if(qubitPrepare&lt;numQubits){<a name="line.221"></a>
<FONT color="green">222</FONT>                            output += "   WARNING: Register was not fully prepared";<a name="line.222"></a>
<FONT color="green">223</FONT>                    }<a name="line.223"></a>
<FONT color="green">224</FONT>                    return output;<a name="line.224"></a>
<FONT color="green">225</FONT>            }<a name="line.225"></a>
<FONT color="green">226</FONT>            <a name="line.226"></a>
<FONT color="green">227</FONT>    <a name="line.227"></a>
<FONT color="green">228</FONT>            /**<a name="line.228"></a>
<FONT color="green">229</FONT>             * Applies the algorithm to the register.<a name="line.229"></a>
<FONT color="green">230</FONT>             * @return String to print to the UI.<a name="line.230"></a>
<FONT color="green">231</FONT>             */<a name="line.231"></a>
<FONT color="green">232</FONT>            public String performIteration() {<a name="line.232"></a>
<FONT color="green">233</FONT>                    Factory.createGroverIteration(searchElem, numQubits).apply(reg);<a name="line.233"></a>
<FONT color="green">234</FONT>                    iteration++;<a name="line.234"></a>
<FONT color="green">235</FONT>                    return "Performed Grover iteration "+iteration+" on the register.";<a name="line.235"></a>
<FONT color="green">236</FONT>            }<a name="line.236"></a>
<FONT color="green">237</FONT>    <a name="line.237"></a>
<FONT color="green">238</FONT>            /**<a name="line.238"></a>
<FONT color="green">239</FONT>             * Prepares the specified qubit of the register.<a name="line.239"></a>
<FONT color="green">240</FONT>             * @return String to print to the UI.<a name="line.240"></a>
<FONT color="green">241</FONT>             */<a name="line.241"></a>
<FONT color="green">242</FONT>            public String prepareRegister() {<a name="line.242"></a>
<FONT color="green">243</FONT>                    <a name="line.243"></a>
<FONT color="green">244</FONT>                    // Perform the preparation<a name="line.244"></a>
<FONT color="green">245</FONT>                    Factory.createHadamard(qubitPrepare).apply(reg);<a name="line.245"></a>
<FONT color="green">246</FONT>                    String action = "Prepared qubit " + qubitPrepare + " by applying a Hadamard gate with target bit "<a name="line.246"></a>
<FONT color="green">247</FONT>                    + qubitPrepare + " to the register.";<a name="line.247"></a>
<FONT color="green">248</FONT>                    <a name="line.248"></a>
<FONT color="green">249</FONT>                    // If the register is now fully prepared, measurements may now be taken<a name="line.249"></a>
<FONT color="green">250</FONT>                    if (qubitPrepare == numQubits-1){<a name="line.250"></a>
<FONT color="green">251</FONT>                            action += " The register is now fully prepared.";<a name="line.251"></a>
<FONT color="green">252</FONT>                    }<a name="line.252"></a>
<FONT color="green">253</FONT>                    <a name="line.253"></a>
<FONT color="green">254</FONT>                    // Return action taken as a string<a name="line.254"></a>
<FONT color="green">255</FONT>                    return action;<a name="line.255"></a>
<FONT color="green">256</FONT>                    <a name="line.256"></a>
<FONT color="green">257</FONT>            }<a name="line.257"></a>
<FONT color="green">258</FONT>    <a name="line.258"></a>
<FONT color="green">259</FONT>            /**<a name="line.259"></a>
<FONT color="green">260</FONT>             * Return the name of the current algorithm.<a name="line.260"></a>
<FONT color="green">261</FONT>             * @return Name of algorithm.<a name="line.261"></a>
<FONT color="green">262</FONT>             */<a name="line.262"></a>
<FONT color="green">263</FONT>            public String getName() {<a name="line.263"></a>
<FONT color="green">264</FONT>                    return "Grovers Algorithm";<a name="line.264"></a>
<FONT color="green">265</FONT>            }<a name="line.265"></a>
<FONT color="green">266</FONT>            <a name="line.266"></a>
<FONT color="green">267</FONT>            /**<a name="line.267"></a>
<FONT color="green">268</FONT>             * Return the minimum allowed number of qubits<a name="line.268"></a>
<FONT color="green">269</FONT>             * @return minNumQubits<a name="line.269"></a>
<FONT color="green">270</FONT>             */<a name="line.270"></a>
<FONT color="green">271</FONT>            public int getMinNumQubits() {<a name="line.271"></a>
<FONT color="green">272</FONT>                    return minNumQubits;<a name="line.272"></a>
<FONT color="green">273</FONT>            }<a name="line.273"></a>
<FONT color="green">274</FONT>    <a name="line.274"></a>
<FONT color="green">275</FONT>            /**<a name="line.275"></a>
<FONT color="green">276</FONT>             * Return the maximum allowed number of qubits<a name="line.276"></a>
<FONT color="green">277</FONT>             * @return maxNumQubits<a name="line.277"></a>
<FONT color="green">278</FONT>             */<a name="line.278"></a>
<FONT color="green">279</FONT>            public int getMaxNumQubits() {<a name="line.279"></a>
<FONT color="green">280</FONT>                    return maxNumQubits;<a name="line.280"></a>
<FONT color="green">281</FONT>            }<a name="line.281"></a>
<FONT color="green">282</FONT>    <a name="line.282"></a>
<FONT color="green">283</FONT>    }<a name="line.283"></a>




























































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